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Subtract 10/40 from 4/84

4/84 - 10/40 is -17/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 40 is 840
  2. For the 1st fraction, since 84 × 10 = 840,
    4/84 = 4 × 10/84 × 10 = 40/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    10/40 = 10 × 21/40 × 21 = 210/840
  4. Subtract the two fractions:
    40/840 - 210/840 = 40 - 210/840 = -170/840
  5. After reducing the fraction, the answer is -17/84

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